public object VisitSuperExpr(Expr.Super expr)
{
int distance;
if (locals.TryGetValue(expr, out distance))
{
LoxClass superclass = (LoxClass)environment.GetAt(distance, "super");
LoxInstance obj = (LoxInstance)environment.GetAt(distance - 1, "this");
LoxFunction method = null;
if (expr.Method != null)
{
method = superclass.FindMethod(expr.Method.Lexeme);
}
else
{
method = superclass.FindMethod(superclass.Name);
}
if (method == null)
{
throw new InterpretingException(expr.Method,
$"Undefined property '{expr.Method.Lexeme}'.");
}
return(method.Bind(obj));
}
return(null);
}
public LoxFunction Bind(LoxInstance instance)
{
var environment = new Environment(closure);
environment.Define("this", instance);
return(new LoxFunction(declaration, environment, isInitializer));
}
public object Call(Interpreter interpreter, List <object> arguments)
{
var instance = new LoxInstance(this);
var initializer = FindMethod(this.name);
if (initializer != null)
{
initializer.Bind(instance).Call(interpreter, arguments);
}
return(instance);
}